Antiglare device for automobiles



March 14, 1933. R E F 1,901,011

ANTIGLARE DEVICE FOR AUTOMOBILES Filed Dec. 12, 1931 awe/WM Jzzlz'azzPaal Zaford,

Patented Mar; 14, 1933 m'rsn mrss T IOFF F JULIANPA'UL 'rnnron'n, OFOKLAHOMA CITY, oKLAEoMA', AssIei-ion TO: neon N."

. rimao. a. HANDLE, W. H. coonrnnannn enaw. RIDDLE;

AN IGIJARE DEVICE ron horo vronrnns Application filed D ecember 12,1931. Serial No. 580,685;

My invention relates to anti-glare devices for use in connection'with anelectric bulb for an automobile headlight, or the like.

I am aware of the fact that it: has heretofore been proposed to mount areflecting shield upon or in advance of the electric bulb of anautomobile headlight. The difficulty experienced in connection with suchdevices is that the average user will not accurately or properly applythe reflecting shield upon the bulb so that it will be positioned at therequiredangle, with the result that the reflectin shield ma lose a artor all of its efficiency in reducing blinding lights.

In accordance with my invention, I provide a reflecting shield which ismounted upon the forward end or end portion of the bulb, and this shieldis carried by an attaching device which, in turn, is secured to a portion of the bulb, preferably the shank ofthe same. The attaching device,when applied to the shank, is held thereto at a fixed angular positionand will, in turn, hold the re flecting shield upon the end or endportion of the bulb in a proper fixed angular position, for renderingefiicient service. The invention is of simple construction, may bemanufactured cheaply, and may be placed in position so that thereflecting shield will assume the correct angular position, by aninexperienced user.

In the accompanying drawing, forming a part of this specification, andin which like numerals are employed to designate like parts throughoutthe same,

Figure 1 is a vertical section through the reflecting shield andattaching device, parts in elevation, showing the same in use,

Figure 2 is a side elevation of the shield and attaching device, removedfrom the bulb,

Figure 3 is a perspective View of the attaching device with thereflecting shield re moved, and

Figure l is an end elevation of the same.

In the drawing, wherein for the purpose of illustration is shown apreferred embodiment of my invention, the numeral 5 designates a bulb ofan electric light, having the usual shank 6, and filament 7 This thelike.

shank 6 is held in the usualsocket andprojects forwardly beyond thissocket, as is customary. "The bulb 5 is arranged within a parabolicreflector 8, having a lens9, as-

sociated therewith, as iscustomary.

-The numeral 10 designates. a reflecting shield. This shield ispreferably substantially opaque, and is preferably formed of glass. Theouter surface of this 'shieldis shield constitutes-a highlypolishedreflecting surface, and this reflecting surface is provided by burningor firing a platinum al- 10y into the concaved surfaceof the glassshield. While thisis preferred, the invention 'is not necessarilyrestrictedto this procise type of refiectmg surface, as the convex sideofthe shield may be suitably treated to provide a reflecting surface,"as is the case of a mirror.

preferably covered by a coating 11, which is" "It is thus seen that theconcave side of the shield surface has an'eflicient reflecting surface.The reflecting shield 10-isspherically curved and isadapted to bemounted upon the forward end or end portion of the bulb 5, with its edge12 or plane arranged at an l inclination. Ihave found thathighly'satisfactory results are obtainable by having the edge 12inclined at anangle of about 30 from the vertical, although this preciseangle may be varied within limits. This angular disposition of theshield allows the filament to be uncovered throughout substantially theupper half ofthe bulb, while the shield covers the filament throughoutsubstantially the lower half of the bulb. I The edge 12 having allportions thereof in a common transverse lnohned plane, permlts of theuncovering of the filament toward the upper side of the bulb in gradualand uniform manner, effecting a superior distribution, or

The attaching device which I provide not shield upon the forward end orendpor'tion of the bulb',:but insures'that theshie'ld W111 assume thecorrect angular position, requiring no adjustment after the attachingdevice has been mounted upon a part of the bulb, such as a shank. 1

This attaching device is preferably formed of spring steel, and includesa lower main strip or body portion 13, including a forward curved armportion 14:, and this forward V curved arm portion carries a pair ofdiverging curved arms 15.: The arms '15 are bent inwardly or over attheir freeends, afi"ording catches or fingers 16. The curved arm portion14 constitutes a third arm, which 1s circumferentially equi-distantlyspaced with respect to the arms 15, these three arms snugly receivingandholding the spherically curved reflecting shield 10, the fingers 16engaging over the edge 12, while fingers 17, formed at the rear end ofthe arm portion 14:, also engage over the edge 12. The remounted uponthe forward end portion of an electric bulb and a separate holdingdevice therefor, said holding device comprising a longitudinal bodyportion including an arm portion provided at its forward free end with apair of diverging arms, the arm portion and the arms beinglongitudinally curved to correspond to the curvature of the shield andhaving their rear end portions substantially circumferentiallyequi-distantlyspaced, said arms being provided at their free ends withinwardly facing extensions to engage over the edge of the shield and thearm portion being provided adjacent to its rear end with an inwardlyprojecting extension to engage over the edge of the shield, said armportion being longer than said arms so that the shield is held at aselected an le, said body portion extending rearwardly eyond the armportion for a substantial disflecting shield 10 is, therefore, securelyheld 1 nd a U-shaped socket carried by the in place upon the holdingdevice and assumes the proper angle'with relation thereto. The rear endof the strip or body portion 13, extends rearwardly beyond the armportion 14 and is provided with an attaching socket 18, which isU-shaped, and is adapted to be sprung upon a portion of the bulb,preferably upon the shank 6. The arm portion 14 is longer than the arms15, and this enables V the arms and arm portion to hold the refiector atthe selected angular position, when applied to the bulb.

In view of the foregoing description, it.

will be seen that the reflector may be quickly and conveniently appliedto the bulb in the car, without the necessity of removing the bulb fromits socket. The socket 18 is mounted upwardly upon the shank 13, andwhen thus applied, it will automatically cause the reflecting shield toassume the proper angular position upon the bulb.

When applied to the forward end or end portion of the bulb, the rays oflight from the filament are reflected upwardly and rearwardly upon theupper portion of the parabolic reflector, and are then projectedforwardly by the reflector and inclined downwardly, to strike the roadat a suitable distance in advance of the automobile. Thedevicewill'eliminate the shadows and blinding lights, and willalsoperceptibly increase the amount of proper illumination upon theroad.

It is to be understood that the form of my invention herewith shown anddescribed, is to be taken as the preferred example'of the same, and thatvarious changesin the size, shape and arrangement of :parts may beresorted to without; departing from the spirit of my invention or thescope of the subjoined claim. 1 1 V Having fully described my invention,what I claim is: r

rear end of the body portion for engaging with the shank of the bulb.

In testimony whereof, I affix my signature.

JULIAN PAUL TEDFORD.

A spherically curved reflecting shield to be

